package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.EmployeeNameExistException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl  implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

   /* @Override
    public Result<String> save(EmployeeDTO dto) {
        //业务健壮性判断
        Employee dbemployee = employeeMapper.getByUsername(dto.getUsername());
        if (dbemployee != null) {
            //用户名已经存在
            throw new EmployeeNameExistException("用户"+dto.getUsername()+"已存在");
        }

        //1.创建employee对象
        Employee employee = new Employee();
        //2.将dto属性值拷贝到employee对象中
        BeanUtils.copyProperties(dto, employee);
        //3.employee其他属性的初始化赋值]
        employee.setPassword(DigestUtils.md5DigestAsHex("1234".getBytes(StandardCharsets.UTF_8)));
        employee.setStatus(1);
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        //4.调用mapper方法保存数据
        employeeMapper.save(employee);

        return Result.success();
    }*/
   public void save(EmployeeDTO employeeDTO) {
       //判断用户名是否存在
       Employee dbEmployee = employeeMapper.getByUsername(employeeDTO.getUsername());
       if(dbEmployee!=null){
           throw new EmployeeNameExistException(dbEmployee.getName()+"已存在");
       }
       Employee employee = new Employee();

       //对象属性拷贝
       BeanUtils.copyProperties(employeeDTO, employee);

       //设置账号的状态，默认正常状态 1表示正常 0表示锁定
       employee.setStatus(StatusConstant.ENABLE);

       //设置密码，默认密码123456
       employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

       //设置当前记录的创建时间和修改时间
      /* employee.setCreateTime(LocalDateTime.now());
       employee.setUpdateTime(LocalDateTime.now());*/

       //设置当前记录创建人id和修改人id
      /* employee.setCreateUser(BaseContext.getCurrentId());//目前写个假数据，后期修改
       employee.setUpdateUser(BaseContext.getCurrentId());*/

       employeeMapper.insert(employee);//后续步骤定义
   }

    /**
     * 分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // select * from employee limit 0,10
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);//后续定义

        long total = page.getTotal();
        List<Employee> records = page.getResult();

        return new PageResult(total, records);
    }
    /**
     * 启用禁用员工账号
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        employeeMapper.startOrStop(status,id);
    }
    /**
     * 根据id查询员工
     *
     * @param id
     * @return
     */
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }
    /**
     * 编辑员工信息
     *
     * @param employee
     */
    public void update(Employee employee) {
        /*employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.update(employee);
    }


}
